Automatic signal-alarm.



P. A. BROWN.

AUTOMATIC SIGNAL ALARM.

APPLICATION FILED MAR. 22, 1905.

Patented Feb. 16, 1909.

2 SHEETS-SHEET 1.

I-I'I FFH r P. A. BROWN.

AUTOMATIC SIGNAL ALARM. APPLICATION FILED MAR. 22, 1905.

Patented Feb. 16, 1909.

2 SHEETS-SHEET 2.

'cated in that room will UNITED STATES PATENT OFFICE.

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AUI'OIA'IIO MORAL-m No. 912,369. v Specification of Letters Patent. Patented Feb- 18, 1900.

Application m mm as, m. an. now.

To all whom it may concern: similar-view showing another form of con- Be it known that I, Pnanon'r A: Brown, a

citizen of the United States, residing in the cit and county of Denver and State of Co orado, have invented certain new and useful Improvements in Automatic Signal Alarms; and I do declare the foil to be a full, clear, and exact descri tion 0 the invention, such as will enable 0t ers skilled in the art to which it appertains to make and use the same, reference being had to the accom anying drawings, and to the letters and gures of reference marked thereon, which form a part of this specification.

My invention relates to automatic signal alarms and may be used as an attachment for an ordina signal may be given at any desired distance from'the bell, throu h the instrumentality of the vibrating bell ammer. 1

As illustrated in the drawing, the use of the device is shown in connection with either a normally open or a normally closed si 1 ing circuit. The circuit of the electric beH is normally open and as illustrated in the drawing it is arranged to be closed through the instrumentality of one or more thermostats. If more than one thermostat is used, they may be located in difierent rooms, and if the temperature of the room rises to any predetermined degree the thermostat l0- view illustrating t e manner of transmitting signals through a normally closed circuit es a telegraph circuit. Fig. 2' illustrates the manner of operating the device in connection with a normallyopen circuit. Fig. 8 is a detail view of an e ectric bell equipped with myimprove'm'ents, the form of the device used in connection with the normally closed circuit, being employed. Fig. 4 is a electric bell, whereby a close the bell circuit,

times except during the short period when signals are transmitted through the instru mentality of m attachment;

The same re erence characters indicate the same parts in the diflerent views of the drawing.

Beferring first to Fig. 3 let the numeral 5 designate an ordinary electric bell considered in its entirety. Also let '6 designate the ng and 7 the vibrating hammer. '8 and are conductors leading to the respec' tivli poles of an electrical source 12 as shown in igs. 1 and 2. This electrical source I2 cue:- the m et and vibrates the hammer whereby it is made to engage the gong 6 in the ordinary manner.

Connected with the hammer 7 is a device 1.8 which I will term a pawl holder. This pawl holder is movably mounted on the easug -of the magnet and carries a pawl M a apted to engage disk 16 revolub y mounted on the magnet casin as shown at 17. This disk as shown in Fig. 3 of the drawin has a plain or un- .toothed rtion 18 whi the riphery of the disk is otherwisev toothed. so by reference to said I! re it will hev observed that the disk is provi ed with a number of orifices 19 arranged-in groups As shown in the draw these groups may be desi ated A, B and The A group contains our openings, the B group two cligenings and the C group two openings. ese openings are all arranged in the same are of a circle. Below. the disk and preferably immediately in contact therewith is an insulating plate 20. This disk is relatively thin, and mount ed on the plate 20 so that a contact spring 21 formin a part 'of the signaling circuit, will break t e said circuit as the contact extremity encounters an opening in the disk, the circuitbeing at all other tunes closed by virtue of'the engagement of the spring contact with the body of the disk which is com of suitable conducting material as "metal.

Assuming that the aforesaid is. true, sigthe ratchet teeth 15 of a to engage the disk and close the sign nalswould be transmitted throughconductors 22, 23, 24, 25, and an electric source 26, to a signaling instrument 27, as thedisk 16 is actuated by the vibration of the bell hammer. For instance as the extremity of the contact spring encounters the openings 19 of cup A in quick succession, this will desi 'ate the first re or a predetermined num r indicating t e location of the thermostat through whoseinstrumentality the electric bell circuit has been closed. As the disk continues to move and engages the openings in iron B, the two signals transmitted by the rea ing of the circuit as the two. openings are encountered in succession, will indicate the next fi re of the number and so on, the group C indicating the same figure as group B. In this event a person in the vicinit derstand that the increased tem rature or the fire for instance is located at o. 422, and this number will indicate its exact location to the person in thevicinity of said instrument. 1

.-Now assuming that it is desired to give signals through a telephone circuit or other normally open circuit, an electric bell equipped with my improvements may be connected with the wires 28 and 29 of the telephone circuit which in this event will be the signaling circuit. These-eennections will be made in any suitable manner to close the signaling circuit intermittently through the mstru'mentality of the 1 construction shown in Fig. 4 of the drawing in which the contact spring 21 enga es an insulatin washer30 mounted on the. (515k and provide with perforations 31 to allow the said s ring 011'- cuit every time the contact spring enters an opening 31. V These openings in the disk may be ouped substantially t e same as shown in ig. 3, but the signals willbe transmitted by'closing the signaling'circuit instead of breaking it as in the. form shown in Fig. 3.

H In other respects the operation of the two 211} and contract unequally, wi

forms of construction is exactl the same.

Let the reference letters D, F and G indicate thermostats located in a number .of,

different rooms and so arranged that the vibrating member H of the thermostat or that com of two substances ada ted to exclose the circuit .when the instrument is subected to a predetermined temperature. llhe circuit-closing ition is illustrated in the case of the bar of the thermostat D. This will close the bell circuit throt h the battery -12'and assuming thatthe be 5 isequ'ipped with the mechanism shown in Fi 3, as soon as the bell hammer 7 begins to v ibrate, the disk 16 will be actuated by the pawl 14 and the signaling circuit connected with the instrument 27 will be intermitof the instrument 27 would unters the orifices 19 of the plate 16. The path of the circuit will be readily understood by reference to Figs. 1 and 3 "of the drawing. An ordinary call box is located in this circuit and desi ated I. The binding gosts on the bell of t 's signalin circuit are esignated 32 and 33, respective y. A conductor 34 leads from one of these binding posts to a contact piece 35 mounted on the pivot post 17 of the disk, the part 35' being eld in place by a nut 36. The contact sprin 21 is connected with the binding post 33. ence the current may be said to pass from one pole of the source 26 throu h the conductor 24, through the call box the conductor 23, binding post 32, the conductor 34, the contact 35, t e disk 16, the contact 21, the bindin post 33, the conductor 22, to and throu h t e instrument 27, and thence through the conductor 25 to the opposite pole of the source 26., It is evident t at the transmission of si als through the'instrument 27 will be t e same no matter which thermostat is employed to close the bell circuit.

When closing a normally open circuit as shown in Fig. 2, the bar H of the thermostat J. will act to close the bell circuit when the temperature has reached the desired or predetermined degree. It is assumed in this case, that the frame of the bell 5 is equipped readily understood. I

-In the'case of the normally open circuit,

the ratchet teeth extend entirely around the periphe of the disk 16, so that the operation of t e disk will be continued as long as the bell circuit is'closed and the signal transmitted will be repeated every time the" disk makesa complete rotation.

While in the form of construction shown in Fig. 3, there is a part 18 on the periphery of the disk containing no ratchet teeth. Hence when the s' aling circuit'is a closed circuit, the operation of the disk will cease when the pawl 14 reaches the blank space 18 on the peri he of the disk.

Having t us escribed my invention, what I claim is:

'1. In an automatic signal alarm, the combination with an electric alarm havin a viwith as the disk is actuated, having an untoothed or blank space on its periphery for the purpose set forth.

' 2. In an automatic signal alarm, the com bination with an electric alarm havin 9. vibratinghammer, of a art connecte with a hammer and provide with a pawl, a revolving member mounted in suitable proximity to the alarm mechanism and engaged 10 by the said pawl, the said revolving member being provided with perforations arranged in 'oups', and a signalingcircuit provided wit a contact located to engage the difi'erent groups of perforations as the said member is revolved, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

PEABODY A. BROWN.

Witnesses:

A. J. OBRIEN, Dmu NELSON. 

